Merge branch 'linus' into core/softlockup
[linux-2.6] / drivers / s390 / net / qeth_l2_main.c
1 /*
2  *  drivers/s390/net/qeth_l2_main.c
3  *
4  *    Copyright IBM Corp. 2007
5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
6  *               Frank Pavlic <fpavlic@de.ibm.com>,
7  *               Thomas Spatzier <tspat@de.ibm.com>,
8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
9  */
10
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/string.h>
14 #include <linux/errno.h>
15 #include <linux/kernel.h>
16 #include <linux/etherdevice.h>
17 #include <linux/mii.h>
18 #include <linux/ip.h>
19
20 #include <asm/s390_rdev.h>
21
22 #include "qeth_core.h"
23 #include "qeth_core_offl.h"
24
25 static int qeth_l2_set_offline(struct ccwgroup_device *);
26 static int qeth_l2_stop(struct net_device *);
27 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
28 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
29                            enum qeth_ipa_cmds,
30                            int (*reply_cb) (struct qeth_card *,
31                                             struct qeth_reply*,
32                                             unsigned long));
33 static void qeth_l2_set_multicast_list(struct net_device *);
34 static int qeth_l2_recover(void *);
35
36 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
37 {
38         struct qeth_card *card = netdev_priv(dev);
39         struct mii_ioctl_data *mii_data;
40         int rc = 0;
41
42         if (!card)
43                 return -ENODEV;
44
45         if ((card->state != CARD_STATE_UP) &&
46                 (card->state != CARD_STATE_SOFTSETUP))
47                 return -ENODEV;
48
49         if (card->info.type == QETH_CARD_TYPE_OSN)
50                 return -EPERM;
51
52         switch (cmd) {
53         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
54                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
55                 break;
56         case SIOC_QETH_GET_CARD_TYPE:
57                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
58                     !card->info.guestlan)
59                         return 1;
60                 return 0;
61                 break;
62         case SIOCGMIIPHY:
63                 mii_data = if_mii(rq);
64                 mii_data->phy_id = 0;
65                 break;
66         case SIOCGMIIREG:
67                 mii_data = if_mii(rq);
68                 if (mii_data->phy_id != 0)
69                         rc = -EINVAL;
70                 else
71                         mii_data->val_out = qeth_mdio_read(dev,
72                                 mii_data->phy_id, mii_data->reg_num);
73                 break;
74         default:
75                 rc = -EOPNOTSUPP;
76         }
77         if (rc)
78                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
79         return rc;
80 }
81
82 static int qeth_l2_verify_dev(struct net_device *dev)
83 {
84         struct qeth_card *card;
85         unsigned long flags;
86         int rc = 0;
87
88         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
89         list_for_each_entry(card, &qeth_core_card_list.list, list) {
90                 if (card->dev == dev) {
91                         rc = QETH_REAL_CARD;
92                         break;
93                 }
94         }
95         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
96
97         return rc;
98 }
99
100 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
101 {
102         struct qeth_card *card;
103         struct net_device *ndev;
104         __u16 temp_dev_no;
105         unsigned long flags;
106         struct ccw_dev_id read_devid;
107
108         ndev = NULL;
109         memcpy(&temp_dev_no, read_dev_no, 2);
110         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
111         list_for_each_entry(card, &qeth_core_card_list.list, list) {
112                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
113                 if (read_devid.devno == temp_dev_no) {
114                         ndev = card->dev;
115                         break;
116                 }
117         }
118         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
119         return ndev;
120 }
121
122 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
123                                 struct qeth_reply *reply,
124                                 unsigned long data)
125 {
126         struct qeth_ipa_cmd *cmd;
127         __u8 *mac;
128
129         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
130         cmd = (struct qeth_ipa_cmd *) data;
131         mac = &cmd->data.setdelmac.mac[0];
132         /* MAC already registered, needed in couple/uncouple case */
133         if (cmd->hdr.return_code == 0x2005) {
134                 QETH_DBF_MESSAGE(2, "Group MAC %02x:%02x:%02x:%02x:%02x:%02x "
135                           "already existing on %s \n",
136                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
137                           QETH_CARD_IFNAME(card));
138                 cmd->hdr.return_code = 0;
139         }
140         if (cmd->hdr.return_code)
141                 QETH_DBF_MESSAGE(2, "Could not set group MAC "
142                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
143                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
144                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
145         return 0;
146 }
147
148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
149 {
150         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
151         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
152                                           qeth_l2_send_setgroupmac_cb);
153 }
154
155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
156                                 struct qeth_reply *reply,
157                                 unsigned long data)
158 {
159         struct qeth_ipa_cmd *cmd;
160         __u8 *mac;
161
162         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
163         cmd = (struct qeth_ipa_cmd *) data;
164         mac = &cmd->data.setdelmac.mac[0];
165         if (cmd->hdr.return_code)
166                 QETH_DBF_MESSAGE(2, "Could not delete group MAC "
167                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
168                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
169                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
170         return 0;
171 }
172
173 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
174 {
175         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
176         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
177                                           qeth_l2_send_delgroupmac_cb);
178 }
179
180 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac)
181 {
182         struct qeth_mc_mac *mc;
183
184         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
185
186         if (!mc)
187                 return;
188
189         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
190         mc->mc_addrlen = OSA_ADDR_LEN;
191
192         if (!qeth_l2_send_setgroupmac(card, mac))
193                 list_add_tail(&mc->list, &card->mc_list);
194         else
195                 kfree(mc);
196 }
197
198 static void qeth_l2_del_all_mc(struct qeth_card *card)
199 {
200         struct qeth_mc_mac *mc, *tmp;
201
202         spin_lock_bh(&card->mclock);
203         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
204                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
205                 list_del(&mc->list);
206                 kfree(mc);
207         }
208         spin_unlock_bh(&card->mclock);
209 }
210
211 static void qeth_l2_get_packet_type(struct qeth_card *card,
212                         struct qeth_hdr *hdr, struct sk_buff *skb)
213 {
214         __u16 hdr_mac;
215
216         if (!memcmp(skb->data + QETH_HEADER_SIZE,
217                     skb->dev->broadcast, 6)) {
218                 /* broadcast? */
219                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
220                 return;
221         }
222         hdr_mac = *((__u16 *)skb->data);
223         /* tr multicast? */
224         switch (card->info.link_type) {
225         case QETH_LINK_TYPE_HSTR:
226         case QETH_LINK_TYPE_LANE_TR:
227                 if ((hdr_mac == QETH_TR_MAC_NC) ||
228                     (hdr_mac == QETH_TR_MAC_C))
229                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
230                 else
231                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
232                 break;
233                 /* eth or so multicast? */
234         default:
235                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
236                      (hdr_mac == QETH_ETH_MAC_V6))
237                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
238                 else
239                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
240         }
241 }
242
243 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
244                         struct sk_buff *skb, int ipv, int cast_type)
245 {
246         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)((skb->data) +
247                                         QETH_HEADER_SIZE);
248
249         memset(hdr, 0, sizeof(struct qeth_hdr));
250         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
251
252         /* set byte byte 3 to casting flags */
253         if (cast_type == RTN_MULTICAST)
254                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
255         else if (cast_type == RTN_BROADCAST)
256                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
257         else
258                 qeth_l2_get_packet_type(card, hdr, skb);
259
260         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
261         /* VSWITCH relies on the VLAN
262          * information to be present in
263          * the QDIO header */
264         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
265                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
266                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
267         }
268 }
269
270 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
271                         struct qeth_reply *reply, unsigned long data)
272 {
273         struct qeth_ipa_cmd *cmd;
274
275         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
276         cmd = (struct qeth_ipa_cmd *) data;
277         if (cmd->hdr.return_code) {
278                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
279                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
280                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
281                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
282                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
283                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
284         }
285         return 0;
286 }
287
288 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
289                                 enum qeth_ipa_cmds ipacmd)
290 {
291         struct qeth_ipa_cmd *cmd;
292         struct qeth_cmd_buffer *iob;
293
294         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
295         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
296         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
297         cmd->data.setdelvlan.vlan_id = i;
298         return qeth_send_ipa_cmd(card, iob,
299                                  qeth_l2_send_setdelvlan_cb, NULL);
300 }
301
302 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
303 {
304         struct qeth_vlan_vid *id;
305         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
306         spin_lock_bh(&card->vlanlock);
307         list_for_each_entry(id, &card->vid_list, list) {
308                 if (clear)
309                         qeth_l2_send_setdelvlan(card, id->vid,
310                                 IPA_CMD_DELVLAN);
311                 else
312                         qeth_l2_send_setdelvlan(card, id->vid,
313                                 IPA_CMD_SETVLAN);
314         }
315         spin_unlock_bh(&card->vlanlock);
316 }
317
318 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
319 {
320         struct qeth_card *card = netdev_priv(dev);
321         struct qeth_vlan_vid *id;
322
323         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
324         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
325         if (id) {
326                 id->vid = vid;
327                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
328                 spin_lock_bh(&card->vlanlock);
329                 list_add_tail(&id->list, &card->vid_list);
330                 spin_unlock_bh(&card->vlanlock);
331         }
332 }
333
334 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
335 {
336         struct qeth_vlan_vid *id, *tmpid = NULL;
337         struct qeth_card *card = netdev_priv(dev);
338
339         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
340         spin_lock_bh(&card->vlanlock);
341         list_for_each_entry(id, &card->vid_list, list) {
342                 if (id->vid == vid) {
343                         list_del(&id->list);
344                         tmpid = id;
345                         break;
346                 }
347         }
348         spin_unlock_bh(&card->vlanlock);
349         if (tmpid) {
350                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
351                 kfree(tmpid);
352         }
353         qeth_l2_set_multicast_list(card->dev);
354 }
355
356 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
357 {
358         int rc = 0;
359
360         QETH_DBF_TEXT(SETUP , 2, "stopcard");
361         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
362
363         qeth_set_allowed_threads(card, 0, 1);
364         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
365                 return -ERESTARTSYS;
366         if (card->read.state == CH_STATE_UP &&
367             card->write.state == CH_STATE_UP &&
368             (card->state == CARD_STATE_UP)) {
369                 if (recovery_mode &&
370                     card->info.type != QETH_CARD_TYPE_OSN) {
371                         qeth_l2_stop(card->dev);
372                 } else {
373                         rtnl_lock();
374                         dev_close(card->dev);
375                         rtnl_unlock();
376                 }
377                 if (!card->use_hard_stop) {
378                         __u8 *mac = &card->dev->dev_addr[0];
379                         rc = qeth_l2_send_delmac(card, mac);
380                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
381                 }
382                 card->state = CARD_STATE_SOFTSETUP;
383         }
384         if (card->state == CARD_STATE_SOFTSETUP) {
385                 qeth_l2_process_vlans(card, 1);
386                 qeth_l2_del_all_mc(card);
387                 qeth_clear_ipacmd_list(card);
388                 card->state = CARD_STATE_HARDSETUP;
389         }
390         if (card->state == CARD_STATE_HARDSETUP) {
391                 qeth_qdio_clear_card(card, 0);
392                 qeth_clear_qdio_buffers(card);
393                 qeth_clear_working_pool_list(card);
394                 card->state = CARD_STATE_DOWN;
395         }
396         if (card->state == CARD_STATE_DOWN) {
397                 qeth_clear_cmd_buffers(&card->read);
398                 qeth_clear_cmd_buffers(&card->write);
399         }
400         card->use_hard_stop = 0;
401         return rc;
402 }
403
404 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
405                             struct qeth_qdio_buffer *buf, int index)
406 {
407         struct qdio_buffer_element *element;
408         struct sk_buff *skb;
409         struct qeth_hdr *hdr;
410         int offset;
411         unsigned int len;
412
413         /* get first element of current buffer */
414         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
415         offset = 0;
416         if (card->options.performance_stats)
417                 card->perf_stats.bufs_rec++;
418         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
419                                        &offset, &hdr))) {
420                 skb->dev = card->dev;
421                 /* is device UP ? */
422                 if (!(card->dev->flags & IFF_UP)) {
423                         dev_kfree_skb_any(skb);
424                         continue;
425                 }
426
427                 switch (hdr->hdr.l2.id) {
428                 case QETH_HEADER_TYPE_LAYER2:
429                         skb->pkt_type = PACKET_HOST;
430                         skb->protocol = eth_type_trans(skb, skb->dev);
431                         if (card->options.checksum_type == NO_CHECKSUMMING)
432                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
433                         else
434                                 skb->ip_summed = CHECKSUM_NONE;
435                         if (skb->protocol == htons(ETH_P_802_2))
436                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
437                         len = skb->len;
438                         netif_rx(skb);
439                         break;
440                 case QETH_HEADER_TYPE_OSN:
441                         skb_push(skb, sizeof(struct qeth_hdr));
442                         skb_copy_to_linear_data(skb, hdr,
443                                                 sizeof(struct qeth_hdr));
444                         len = skb->len;
445                         card->osn_info.data_cb(skb);
446                         break;
447                 default:
448                         dev_kfree_skb_any(skb);
449                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
450                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
451                         continue;
452                 }
453                 card->dev->last_rx = jiffies;
454                 card->stats.rx_packets++;
455                 card->stats.rx_bytes += len;
456         }
457 }
458
459 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
460                            enum qeth_ipa_cmds ipacmd,
461                            int (*reply_cb) (struct qeth_card *,
462                                             struct qeth_reply*,
463                                             unsigned long))
464 {
465         struct qeth_ipa_cmd *cmd;
466         struct qeth_cmd_buffer *iob;
467
468         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
469         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
470         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
471         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
472         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
473         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
474 }
475
476 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
477                            struct qeth_reply *reply,
478                            unsigned long data)
479 {
480         struct qeth_ipa_cmd *cmd;
481
482         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
483         cmd = (struct qeth_ipa_cmd *) data;
484         if (cmd->hdr.return_code) {
485                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
486                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
487                 cmd->hdr.return_code = -EIO;
488         } else {
489                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
490                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
491                        OSA_ADDR_LEN);
492                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
493                            "successfully registered on device %s\n",
494                            card->dev->dev_addr[0], card->dev->dev_addr[1],
495                            card->dev->dev_addr[2], card->dev->dev_addr[3],
496                            card->dev->dev_addr[4], card->dev->dev_addr[5],
497                            card->dev->name);
498         }
499         return 0;
500 }
501
502 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
503 {
504         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
505         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
506                                           qeth_l2_send_setmac_cb);
507 }
508
509 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
510                            struct qeth_reply *reply,
511                            unsigned long data)
512 {
513         struct qeth_ipa_cmd *cmd;
514
515         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
516         cmd = (struct qeth_ipa_cmd *) data;
517         if (cmd->hdr.return_code) {
518                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
519                 cmd->hdr.return_code = -EIO;
520                 return 0;
521         }
522         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
523
524         return 0;
525 }
526
527 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
528 {
529         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
530         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
531                 return 0;
532         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
533                                           qeth_l2_send_delmac_cb);
534 }
535
536 static int qeth_l2_request_initial_mac(struct qeth_card *card)
537 {
538         int rc = 0;
539         char vendor_pre[] = {0x02, 0x00, 0x00};
540
541         QETH_DBF_TEXT(SETUP, 2, "doL2init");
542         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
543
544         rc = qeth_query_setadapterparms(card);
545         if (rc) {
546                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
547                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
548         }
549
550         if (card->info.guestlan) {
551                 rc = qeth_setadpparms_change_macaddr(card);
552                 if (rc) {
553                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
554                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
555                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
556                         return rc;
557                 }
558                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
559         } else {
560                 random_ether_addr(card->dev->dev_addr);
561                 memcpy(card->dev->dev_addr, vendor_pre, 3);
562         }
563         return 0;
564 }
565
566 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
567 {
568         struct sockaddr *addr = p;
569         struct qeth_card *card = netdev_priv(dev);
570         int rc = 0;
571
572         QETH_DBF_TEXT(TRACE, 3, "setmac");
573
574         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
575                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
576                 return -EOPNOTSUPP;
577         }
578
579         if (card->info.type == QETH_CARD_TYPE_OSN) {
580                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
581                 return -EOPNOTSUPP;
582         }
583         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
584         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
585         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
586         if (!rc)
587                 rc = qeth_l2_send_setmac(card, addr->sa_data);
588         return rc;
589 }
590
591 static void qeth_l2_set_multicast_list(struct net_device *dev)
592 {
593         struct qeth_card *card = netdev_priv(dev);
594         struct dev_mc_list *dm;
595
596         if (card->info.type == QETH_CARD_TYPE_OSN)
597                 return ;
598
599         QETH_DBF_TEXT(TRACE, 3, "setmulti");
600         qeth_l2_del_all_mc(card);
601         spin_lock_bh(&card->mclock);
602         for (dm = dev->mc_list; dm; dm = dm->next)
603                 qeth_l2_add_mc(card, dm->dmi_addr);
604         spin_unlock_bh(&card->mclock);
605         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
606                 return;
607         qeth_setadp_promisc_mode(card);
608 }
609
610 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
611 {
612         int rc;
613         struct qeth_hdr *hdr = NULL;
614         int elements = 0;
615         struct qeth_card *card = netdev_priv(dev);
616         struct sk_buff *new_skb = skb;
617         int ipv = qeth_get_ip_version(skb);
618         int cast_type = qeth_get_cast_type(card, skb);
619         struct qeth_qdio_out_q *queue = card->qdio.out_qs
620                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
621         int tx_bytes = skb->len;
622         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
623         struct qeth_eddp_context *ctx = NULL;
624
625         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
626                 card->stats.tx_carrier_errors++;
627                 goto tx_drop;
628         }
629
630         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
631             (skb->protocol == htons(ETH_P_IPV6)))
632                 goto tx_drop;
633
634         if (card->options.performance_stats) {
635                 card->perf_stats.outbound_cnt++;
636                 card->perf_stats.outbound_start_time = qeth_get_micros();
637         }
638         netif_stop_queue(dev);
639
640         if (skb_is_gso(skb))
641                 large_send = QETH_LARGE_SEND_EDDP;
642
643         if (card->info.type == QETH_CARD_TYPE_OSN)
644                 hdr = (struct qeth_hdr *)skb->data;
645         else {
646                 /* create a clone with writeable headroom */
647                 new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr));
648                 if (!new_skb)
649                         goto tx_drop;
650                 hdr = (struct qeth_hdr *)skb_push(new_skb,
651                                                 sizeof(struct qeth_hdr));
652                 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
653         }
654
655         if (large_send == QETH_LARGE_SEND_EDDP) {
656                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
657                                                 skb->sk->sk_protocol);
658                 if (ctx == NULL) {
659                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
660                         goto tx_drop;
661                 }
662         } else {
663                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0);
664                 if (!elements)
665                         goto tx_drop;
666         }
667
668         if ((large_send == QETH_LARGE_SEND_NO) &&
669             (skb->ip_summed == CHECKSUM_PARTIAL))
670                 qeth_tx_csum(new_skb);
671
672         if (card->info.type != QETH_CARD_TYPE_IQD)
673                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
674                                          elements, ctx);
675         else
676                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
677                                               elements, ctx);
678         if (!rc) {
679                 card->stats.tx_packets++;
680                 card->stats.tx_bytes += tx_bytes;
681                 if (new_skb != skb)
682                         dev_kfree_skb_any(skb);
683                 if (card->options.performance_stats) {
684                         if (large_send != QETH_LARGE_SEND_NO) {
685                                 card->perf_stats.large_send_bytes += tx_bytes;
686                                 card->perf_stats.large_send_cnt++;
687                         }
688                         if (skb_shinfo(new_skb)->nr_frags > 0) {
689                                 card->perf_stats.sg_skbs_sent++;
690                                 /* nr_frags + skb->data */
691                                 card->perf_stats.sg_frags_sent +=
692                                         skb_shinfo(new_skb)->nr_frags + 1;
693                         }
694                 }
695
696                 if (ctx != NULL) {
697                         qeth_eddp_put_context(ctx);
698                         dev_kfree_skb_any(new_skb);
699                 }
700         } else {
701                 if (ctx != NULL)
702                         qeth_eddp_put_context(ctx);
703
704                 if (rc == -EBUSY) {
705                         if (new_skb != skb)
706                                 dev_kfree_skb_any(new_skb);
707                         return NETDEV_TX_BUSY;
708                 } else
709                         goto tx_drop;
710         }
711
712         netif_wake_queue(dev);
713         if (card->options.performance_stats)
714                 card->perf_stats.outbound_time += qeth_get_micros() -
715                         card->perf_stats.outbound_start_time;
716         return rc;
717
718 tx_drop:
719         card->stats.tx_dropped++;
720         card->stats.tx_errors++;
721         if ((new_skb != skb) && new_skb)
722                 dev_kfree_skb_any(new_skb);
723         dev_kfree_skb_any(skb);
724         netif_wake_queue(dev);
725         return NETDEV_TX_OK;
726 }
727
728 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
729                         unsigned int status, unsigned int qdio_err,
730                         unsigned int siga_err, unsigned int queue,
731                         int first_element, int count, unsigned long card_ptr)
732 {
733         struct net_device *net_dev;
734         struct qeth_card *card;
735         struct qeth_qdio_buffer *buffer;
736         int index;
737         int i;
738
739         card = (struct qeth_card *) card_ptr;
740         net_dev = card->dev;
741         if (card->options.performance_stats) {
742                 card->perf_stats.inbound_cnt++;
743                 card->perf_stats.inbound_start_time = qeth_get_micros();
744         }
745         if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
746                 if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
747                         QETH_DBF_TEXT(TRACE, 1, "qdinchk");
748                         QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
749                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
750                                         count);
751                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", queue, status);
752                         qeth_schedule_recovery(card);
753                         return;
754                 }
755         }
756         for (i = first_element; i < (first_element + count); ++i) {
757                 index = i % QDIO_MAX_BUFFERS_PER_Q;
758                 buffer = &card->qdio.in_q->bufs[index];
759                 if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
760                       qeth_check_qdio_errors(buffer->buffer,
761                                              qdio_err, siga_err, "qinerr")))
762                         qeth_l2_process_inbound_buffer(card, buffer, index);
763                 /* clear buffer and give back to hardware */
764                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
765                 qeth_queue_input_buffer(card, index);
766         }
767         if (card->options.performance_stats)
768                 card->perf_stats.inbound_time += qeth_get_micros() -
769                         card->perf_stats.inbound_start_time;
770 }
771
772 static int qeth_l2_open(struct net_device *dev)
773 {
774         struct qeth_card *card = netdev_priv(dev);
775
776         QETH_DBF_TEXT(TRACE, 4, "qethopen");
777         if (card->state != CARD_STATE_SOFTSETUP)
778                 return -ENODEV;
779
780         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
781              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
782                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
783                 return -EPERM;
784         }
785         card->data.state = CH_STATE_UP;
786         card->state = CARD_STATE_UP;
787         card->dev->flags |= IFF_UP;
788         netif_start_queue(dev);
789
790         if (!card->lan_online && netif_carrier_ok(dev))
791                 netif_carrier_off(dev);
792         return 0;
793 }
794
795
796 static int qeth_l2_stop(struct net_device *dev)
797 {
798         struct qeth_card *card = netdev_priv(dev);
799
800         QETH_DBF_TEXT(TRACE, 4, "qethstop");
801         netif_tx_disable(dev);
802         card->dev->flags &= ~IFF_UP;
803         if (card->state == CARD_STATE_UP)
804                 card->state = CARD_STATE_SOFTSETUP;
805         return 0;
806 }
807
808 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
809 {
810         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
811
812         INIT_LIST_HEAD(&card->vid_list);
813         INIT_LIST_HEAD(&card->mc_list);
814         card->options.layer2 = 1;
815         card->discipline.input_handler = (qdio_handler_t *)
816                 qeth_l2_qdio_input_handler;
817         card->discipline.output_handler = (qdio_handler_t *)
818                 qeth_qdio_output_handler;
819         card->discipline.recover = qeth_l2_recover;
820         return 0;
821 }
822
823 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
824 {
825         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
826
827         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
828
829         if (cgdev->state == CCWGROUP_ONLINE) {
830                 card->use_hard_stop = 1;
831                 qeth_l2_set_offline(cgdev);
832         }
833
834         if (card->dev) {
835                 unregister_netdev(card->dev);
836                 card->dev = NULL;
837         }
838
839         qeth_l2_del_all_mc(card);
840         return;
841 }
842
843 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
844 {
845         struct qeth_card *card = netdev_priv(dev);
846
847         if (data) {
848                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
849                         card->options.large_send = QETH_LARGE_SEND_EDDP;
850                         dev->features |= NETIF_F_TSO;
851                 }
852         } else {
853                 dev->features &= ~NETIF_F_TSO;
854                 card->options.large_send = QETH_LARGE_SEND_NO;
855         }
856         return 0;
857 }
858
859 static struct ethtool_ops qeth_l2_ethtool_ops = {
860         .get_link = ethtool_op_get_link,
861         .get_tx_csum = ethtool_op_get_tx_csum,
862         .set_tx_csum = ethtool_op_set_tx_hw_csum,
863         .get_sg = ethtool_op_get_sg,
864         .set_sg = ethtool_op_set_sg,
865         .get_tso = ethtool_op_get_tso,
866         .set_tso = qeth_l2_ethtool_set_tso,
867         .get_strings = qeth_core_get_strings,
868         .get_ethtool_stats = qeth_core_get_ethtool_stats,
869         .get_stats_count = qeth_core_get_stats_count,
870         .get_drvinfo = qeth_core_get_drvinfo,
871         .get_settings = qeth_core_ethtool_get_settings,
872 };
873
874 static struct ethtool_ops qeth_l2_osn_ops = {
875         .get_strings = qeth_core_get_strings,
876         .get_ethtool_stats = qeth_core_get_ethtool_stats,
877         .get_stats_count = qeth_core_get_stats_count,
878         .get_drvinfo = qeth_core_get_drvinfo,
879 };
880
881 static int qeth_l2_setup_netdev(struct qeth_card *card)
882 {
883         switch (card->info.type) {
884         case QETH_CARD_TYPE_OSAE:
885                 card->dev = alloc_etherdev(0);
886                 break;
887         case QETH_CARD_TYPE_IQD:
888                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
889                 break;
890         case QETH_CARD_TYPE_OSN:
891                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
892                 card->dev->flags |= IFF_NOARP;
893                 break;
894         default:
895                 card->dev = alloc_etherdev(0);
896         }
897
898         if (!card->dev)
899                 return -ENODEV;
900
901         card->dev->priv = card;
902         card->dev->tx_timeout = &qeth_tx_timeout;
903         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
904         card->dev->open = qeth_l2_open;
905         card->dev->stop = qeth_l2_stop;
906         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
907         card->dev->do_ioctl = qeth_l2_do_ioctl;
908         card->dev->get_stats = qeth_get_stats;
909         card->dev->change_mtu = qeth_change_mtu;
910         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
911         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
912         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
913         card->dev->set_mac_address = qeth_l2_set_mac_address;
914         card->dev->mtu = card->info.initial_mtu;
915         if (card->info.type != QETH_CARD_TYPE_OSN)
916                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
917         else
918                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
919         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
920         card->info.broadcast_capable = 1;
921         qeth_l2_request_initial_mac(card);
922         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
923         return register_netdev(card->dev);
924 }
925
926 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
927 {
928         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
929         int rc = 0;
930         enum qeth_card_states recover_flag;
931
932         BUG_ON(!card);
933         QETH_DBF_TEXT(SETUP, 2, "setonlin");
934         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
935
936         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
937         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
938                 PRINT_WARN("set_online of card %s interrupted by user!\n",
939                            CARD_BUS_ID(card));
940                 return -ERESTARTSYS;
941         }
942
943         recover_flag = card->state;
944         rc = ccw_device_set_online(CARD_RDEV(card));
945         if (rc) {
946                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
947                 return -EIO;
948         }
949         rc = ccw_device_set_online(CARD_WDEV(card));
950         if (rc) {
951                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
952                 return -EIO;
953         }
954         rc = ccw_device_set_online(CARD_DDEV(card));
955         if (rc) {
956                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
957                 return -EIO;
958         }
959
960         rc = qeth_core_hardsetup_card(card);
961         if (rc) {
962                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
963                 goto out_remove;
964         }
965
966         if (!card->dev && qeth_l2_setup_netdev(card))
967                 goto out_remove;
968
969         if (card->info.type != QETH_CARD_TYPE_OSN)
970                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
971
972         card->state = CARD_STATE_HARDSETUP;
973         qeth_print_status_message(card);
974
975         /* softsetup */
976         QETH_DBF_TEXT(SETUP, 2, "softsetp");
977
978         rc = qeth_send_startlan(card);
979         if (rc) {
980                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
981                 if (rc == 0xe080) {
982                         PRINT_WARN("LAN on card %s if offline! "
983                                    "Waiting for STARTLAN from card.\n",
984                                    CARD_BUS_ID(card));
985                         card->lan_online = 0;
986                 }
987                 return rc;
988         } else
989                 card->lan_online = 1;
990
991         if (card->info.type != QETH_CARD_TYPE_OSN) {
992                 qeth_set_large_send(card, card->options.large_send);
993                 qeth_l2_process_vlans(card, 0);
994         }
995
996         netif_tx_disable(card->dev);
997
998         rc = qeth_init_qdio_queues(card);
999         if (rc) {
1000                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1001                 goto out_remove;
1002         }
1003         card->state = CARD_STATE_SOFTSETUP;
1004         netif_carrier_on(card->dev);
1005
1006         qeth_set_allowed_threads(card, 0xffffffff, 0);
1007         if (recover_flag == CARD_STATE_RECOVER) {
1008                 if (recovery_mode &&
1009                     card->info.type != QETH_CARD_TYPE_OSN) {
1010                         qeth_l2_open(card->dev);
1011                 } else {
1012                         rtnl_lock();
1013                         dev_open(card->dev);
1014                         rtnl_unlock();
1015                 }
1016                 /* this also sets saved unicast addresses */
1017                 qeth_l2_set_multicast_list(card->dev);
1018         }
1019         /* let user_space know that device is online */
1020         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1021         return 0;
1022 out_remove:
1023         card->use_hard_stop = 1;
1024         qeth_l2_stop_card(card, 0);
1025         ccw_device_set_offline(CARD_DDEV(card));
1026         ccw_device_set_offline(CARD_WDEV(card));
1027         ccw_device_set_offline(CARD_RDEV(card));
1028         if (recover_flag == CARD_STATE_RECOVER)
1029                 card->state = CARD_STATE_RECOVER;
1030         else
1031                 card->state = CARD_STATE_DOWN;
1032         return -ENODEV;
1033 }
1034
1035 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1036 {
1037         return __qeth_l2_set_online(gdev, 0);
1038 }
1039
1040 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1041                                         int recovery_mode)
1042 {
1043         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1044         int rc = 0, rc2 = 0, rc3 = 0;
1045         enum qeth_card_states recover_flag;
1046
1047         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1048         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1049
1050         if (card->dev && netif_carrier_ok(card->dev))
1051                 netif_carrier_off(card->dev);
1052         recover_flag = card->state;
1053         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1054                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1055                            CARD_BUS_ID(card));
1056                 return -ERESTARTSYS;
1057         }
1058         rc  = ccw_device_set_offline(CARD_DDEV(card));
1059         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1060         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1061         if (!rc)
1062                 rc = (rc2) ? rc2 : rc3;
1063         if (rc)
1064                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1065         if (recover_flag == CARD_STATE_UP)
1066                 card->state = CARD_STATE_RECOVER;
1067         /* let user_space know that device is offline */
1068         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1069         return 0;
1070 }
1071
1072 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1073 {
1074         return __qeth_l2_set_offline(cgdev, 0);
1075 }
1076
1077 static int qeth_l2_recover(void *ptr)
1078 {
1079         struct qeth_card *card;
1080         int rc = 0;
1081
1082         card = (struct qeth_card *) ptr;
1083         QETH_DBF_TEXT(TRACE, 2, "recover1");
1084         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1085         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1086                 return 0;
1087         QETH_DBF_TEXT(TRACE, 2, "recover2");
1088         PRINT_WARN("Recovery of device %s started ...\n",
1089                    CARD_BUS_ID(card));
1090         card->use_hard_stop = 1;
1091         __qeth_l2_set_offline(card->gdev, 1);
1092         rc = __qeth_l2_set_online(card->gdev, 1);
1093         /* don't run another scheduled recovery */
1094         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1095         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1096         if (!rc)
1097                 PRINT_INFO("Device %s successfully recovered!\n",
1098                            CARD_BUS_ID(card));
1099         else
1100                 PRINT_INFO("Device %s could not be recovered!\n",
1101                            CARD_BUS_ID(card));
1102         return 0;
1103 }
1104
1105 static int __init qeth_l2_init(void)
1106 {
1107         PRINT_INFO("register layer 2 discipline\n");
1108         return 0;
1109 }
1110
1111 static void __exit qeth_l2_exit(void)
1112 {
1113         PRINT_INFO("unregister layer 2 discipline\n");
1114 }
1115
1116 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1117 {
1118         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1119         qeth_qdio_clear_card(card, 0);
1120         qeth_clear_qdio_buffers(card);
1121 }
1122
1123 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1124         .probe = qeth_l2_probe_device,
1125         .remove = qeth_l2_remove_device,
1126         .set_online = qeth_l2_set_online,
1127         .set_offline = qeth_l2_set_offline,
1128         .shutdown = qeth_l2_shutdown,
1129 };
1130 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1131
1132 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1133                            struct qeth_cmd_buffer *iob)
1134 {
1135         unsigned long flags;
1136         int rc = 0;
1137
1138         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1139
1140         wait_event(card->wait_q,
1141                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1142         qeth_prepare_control_data(card, len, iob);
1143         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1144         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1145         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1146                               (addr_t) iob, 0, 0);
1147         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1148         if (rc) {
1149                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1150                            "ccw_device_start rc = %i\n", rc);
1151                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1152                 qeth_release_buffer(iob->channel, iob);
1153                 atomic_set(&card->write.irq_pending, 0);
1154                 wake_up(&card->wait_q);
1155         }
1156         return rc;
1157 }
1158
1159 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1160                         struct qeth_cmd_buffer *iob, int data_len)
1161 {
1162         u16 s1, s2;
1163
1164         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1165
1166         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1167         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1168         s2 = (u16)data_len;
1169         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1170         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1171         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1172         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1173         return qeth_osn_send_control_data(card, s1, iob);
1174 }
1175
1176 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1177 {
1178         struct qeth_cmd_buffer *iob;
1179         struct qeth_card *card;
1180         int rc;
1181
1182         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1183         if (!dev)
1184                 return -ENODEV;
1185         card = netdev_priv(dev);
1186         if (!card)
1187                 return -ENODEV;
1188         if ((card->state != CARD_STATE_UP) &&
1189             (card->state != CARD_STATE_SOFTSETUP))
1190                 return -ENODEV;
1191         iob = qeth_wait_for_buffer(&card->write);
1192         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1193         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1194         return rc;
1195 }
1196 EXPORT_SYMBOL(qeth_osn_assist);
1197
1198 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1199                   int (*assist_cb)(struct net_device *, void *),
1200                   int (*data_cb)(struct sk_buff *))
1201 {
1202         struct qeth_card *card;
1203
1204         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1205         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1206         if (*dev == NULL)
1207                 return -ENODEV;
1208         card = netdev_priv(*dev);
1209         if (!card)
1210                 return -ENODEV;
1211         if ((assist_cb == NULL) || (data_cb == NULL))
1212                 return -EINVAL;
1213         card->osn_info.assist_cb = assist_cb;
1214         card->osn_info.data_cb = data_cb;
1215         return 0;
1216 }
1217 EXPORT_SYMBOL(qeth_osn_register);
1218
1219 void qeth_osn_deregister(struct net_device *dev)
1220 {
1221         struct qeth_card *card;
1222
1223         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1224         if (!dev)
1225                 return;
1226         card = netdev_priv(dev);
1227         if (!card)
1228                 return;
1229         card->osn_info.assist_cb = NULL;
1230         card->osn_info.data_cb = NULL;
1231         return;
1232 }
1233 EXPORT_SYMBOL(qeth_osn_deregister);
1234
1235 module_init(qeth_l2_init);
1236 module_exit(qeth_l2_exit);
1237 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1238 MODULE_DESCRIPTION("qeth layer 2 discipline");
1239 MODULE_LICENSE("GPL");